lastic modulus of concrete

[702005]

hi
I model rc building 15 storys ,seismic zone 2,
the strengt of concrete is 25 mpa ,what is the value of the elastic modulus of concrete

 

[slickdeals]

elastic modulus is a function of the Strength of concrete. It is 57000 * sqrt (fc') in the US units. I am not sure what the metric equivalent is. You should be able to find in ACI 318M

 

[702005]

thank you slickdeals for the reply
they told me to use the elastic modulus of concrete short term , the value of E is greater about 1.5 time than E from the equation 57000 * sqrt (fc')
is that correct